Preparation of Liquid splitting Media Andtheir Impaction on the PV/T Systems
Spectral beam splitting photovoltaic/thermal(PV/T)hybrid utilization technology breaks the conflict between the low operating temperature of PV cells and their high-grade heat demand and achieves efficient photoelectric efficiency and thermal efficiency.However,the preparation of suitable selective splitting media plays a crucial role in achieving reasonable energy distribution within PV/T devices.In this study,deionized water was chosen as the base liquid,and the combination of noble metal Ag nanoparticles and inorganic CoSO4 was utilized to achieve efficient regulation of the optical properties of splitting liquids.In addition,based on the energy balance method,the electrical and thermal output models of a typical PV/T prototype system were established,and the thermal and electrical output characteristics of the system before and after the optical regulation of the splitting medium were analyzed.The results show that the water-based filter has efficient infrared absorption characteristics.After adding Ag nanoparticles,the splitting medium exhibits a clear absorption peak in the visible light band,with a peak of 435 nm.After further addition of CoSO4,the absorption peak width of the nanofluid can be expanded,and it also has certain absorption enhancement in infrared.Comparing the influence of the splitting medium on the thermal and electrical performance of the PV/T system before and after optical regulation,it can be seen that the total absorption characteristics of the splitting medium increase,and the thermal efficiency of the PV/T system shows an increasing trend,but its electrical efficiency decreases.The total exergetic efficiency of the liquid-based splitting PV/T system also increases,exceeding 28%.Efficient regulation of the optical characteristics of the splitting media can achieve a controllable allocation of internal energy in PV/T systems.
NETL
NSTL
万方数据
